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<td class="page-title-pattern-first-line " style="padding: 0px; border-collapse: collapse; font-family: Arial, sans-serif; font-size: 14px; padding-top: 10px"> <a href="https://hibernate.atlassian.net/browse/HHH" style="color: #3b73af; text-decoration: none">Hibernate ORM</a> / <a href="https://hibernate.atlassian.net/browse/HHH-9122" style="color: #3b73af; text-decoration: none"><img src="cid:jira-generated-image-static-bug-416899dd-1e42-4b38-bc21-222ecef569a1" height="16" width="16" border="0" align="absmiddle" alt="Bug" style="vertical-align: text-bottom" /></a> <a href="https://hibernate.atlassian.net/browse/HHH-9122" style="color: #3b73af; text-decoration: none">HHH-9122</a>
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Issue Type:
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Affects Versions:
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4.3.5
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Unassigned
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Components:
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entity-manager, metagen, metamodel
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Created:
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14/Apr/14 8:22 AM
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Priority:
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Reporter:
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<td style="padding: 0px; border-collapse: collapse; font: normal 14px/20px Arial, sans-serif; padding: 2px 0 2px 5px; vertical-align: top"> <a class="user-hover" rel="twhitbeck" id="email_twhitbeck" href="https://hibernate.atlassian.net/secure/ViewProfile.jspa?name=twhitbeck" style="color:#6c797f;; color: #3b73af; text-decoration: none">Tim Whitbeck</a>
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<p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0 0">I have a simple entity with a composite primary key:</p>
<div class="code panel" style="border-width: 1px;; border: 1px solid #ccc; background: #f5f5f5; font-size: 12px; line-height: 1.333; font-family: monospace; border: 1px solid #ccc; -moz-border-radius: 3px 3px 3px 3px; border-radius: 3px 3px 3px 3px; margin: 9px 0">
<div class="codeContent panelContent" style="padding: 9px 12px">
<pre class="code-java" style="margin: 10px 0 0 0; max-height: 30em; overflow: auto; white-space: pre-wrap; word-wrap: normal">
@Entity
@Table(name = <span class="code-quote" style="color: #009100">"person_conversation_meta"</span>)
@IdClass(ConversationMeta.Id.class)
<span class="code-keyword" style="color: #000091">public</span> class ConversationMeta {
<span class="code-keyword" style="color: #000091">public</span> <span class="code-keyword" style="color: #000091">static</span> class Id <span class="code-keyword" style="color: #000091">implements</span> Serializable {
<span class="code-keyword" style="color: #000091">private</span> <span class="code-object" style="color: #910091">int</span> conversation;
<span class="code-keyword" style="color: #000091">private</span> <span class="code-object" style="color: #910091">int</span> person;
<span class="code-keyword" style="color: #000091">public</span> Id() {
}
<span class="code-keyword" style="color: #000091">public</span> Id(<span class="code-object" style="color: #910091">int</span> conversation, <span class="code-object" style="color: #910091">int</span> person) {
<span class="code-keyword" style="color: #000091">this</span>.conversation = conversation;
<span class="code-keyword" style="color: #000091">this</span>.person = person;
}
<span class="code-keyword" style="color: #000091">public</span> <span class="code-object" style="color: #910091">int</span> getConversation() {
<span class="code-keyword" style="color: #000091">return</span> conversation;
}
<span class="code-keyword" style="color: #000091">public</span> void setConversation(<span class="code-object" style="color: #910091">int</span> conversation) {
<span class="code-keyword" style="color: #000091">this</span>.conversation = conversation;
}
<span class="code-keyword" style="color: #000091">public</span> <span class="code-object" style="color: #910091">int</span> getPerson() {
<span class="code-keyword" style="color: #000091">return</span> person;
}
<span class="code-keyword" style="color: #000091">public</span> void setPerson(<span class="code-object" style="color: #910091">int</span> person) {
<span class="code-keyword" style="color: #000091">this</span>.person = person;
}
@Override
<span class="code-keyword" style="color: #000091">public</span> <span class="code-object" style="color: #910091">boolean</span> equals(<span class="code-object" style="color: #910091">Object</span> o) {
<span class="code-keyword" style="color: #000091">if</span> (<span class="code-keyword" style="color: #000091">this</span> == o) <span class="code-keyword" style="color: #000091">return</span> <span class="code-keyword" style="color: #000091">true</span>;
<span class="code-keyword" style="color: #000091">if</span> (o == <span class="code-keyword" style="color: #000091">null</span> || getClass() != o.getClass()) <span class="code-keyword" style="color: #000091">return</span> <span class="code-keyword" style="color: #000091">false</span>;
Id id = (Id)o;
<span class="code-keyword" style="color: #000091">if</span> (conversation != id.conversation) <span class="code-keyword" style="color: #000091">return</span> <span class="code-keyword" style="color: #000091">false</span>;
<span class="code-keyword" style="color: #000091">if</span> (person != id.person) <span class="code-keyword" style="color: #000091">return</span> <span class="code-keyword" style="color: #000091">false</span>;
<span class="code-keyword" style="color: #000091">return</span> <span class="code-keyword" style="color: #000091">true</span>;
}
@Override
<span class="code-keyword" style="color: #000091">public</span> <span class="code-object" style="color: #910091">int</span> hashCode() {
<span class="code-object" style="color: #910091">int</span> result = conversation;
result = 31 * result + person;
<span class="code-keyword" style="color: #000091">return</span> result;
}
}
@javax.persistence.Id
@ManyToOne(optional = <span class="code-keyword" style="color: #000091">false</span>, fetch = FetchType.LAZY)
@JoinColumn(name = <span class="code-quote" style="color: #009100">"person_id"</span>, nullable = <span class="code-keyword" style="color: #000091">false</span>)
<span class="code-keyword" style="color: #000091">private</span> Person person;
@javax.persistence.Id
@ManyToOne(optional = <span class="code-keyword" style="color: #000091">false</span>, fetch = FetchType.LAZY)
@JoinColumn(name = <span class="code-quote" style="color: #009100">"conversation_id"</span>, nullable = <span class="code-keyword" style="color: #000091">false</span>)
<span class="code-keyword" style="color: #000091">private</span> Conversation conversation;
@Column(name = <span class="code-quote" style="color: #009100">"is_read"</span>, nullable = <span class="code-keyword" style="color: #000091">false</span>)
<span class="code-keyword" style="color: #000091">private</span> <span class="code-object" style="color: #910091">boolean</span> read;
@Column(nullable = <span class="code-keyword" style="color: #000091">false</span>)
<span class="code-keyword" style="color: #000091">private</span> <span class="code-object" style="color: #910091">boolean</span> starred;
<span class="code-keyword" style="color: #000091">public</span> Person getPerson() {
<span class="code-keyword" style="color: #000091">return</span> person;
}
<span class="code-keyword" style="color: #000091">public</span> void setPerson(Person person) {
<span class="code-keyword" style="color: #000091">this</span>.person = person;
}
<span class="code-keyword" style="color: #000091">public</span> Conversation getConversation() {
<span class="code-keyword" style="color: #000091">return</span> conversation;
}
<span class="code-keyword" style="color: #000091">public</span> void setConversation(Conversation conversation) {
<span class="code-keyword" style="color: #000091">this</span>.conversation = conversation;
}
<span class="code-keyword" style="color: #000091">public</span> <span class="code-object" style="color: #910091">boolean</span> isRead() {
<span class="code-keyword" style="color: #000091">return</span> read;
}
<span class="code-keyword" style="color: #000091">public</span> void setRead(<span class="code-object" style="color: #910091">boolean</span> read) {
<span class="code-keyword" style="color: #000091">this</span>.read = read;
}
<span class="code-keyword" style="color: #000091">public</span> <span class="code-object" style="color: #910091">boolean</span> isStarred() {
<span class="code-keyword" style="color: #000091">return</span> starred;
}
<span class="code-keyword" style="color: #000091">public</span> void setStarred(<span class="code-object" style="color: #910091">boolean</span> starred) {
<span class="code-keyword" style="color: #000091">this</span>.starred = starred;
}
}
</pre>
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</div>
<p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0 0">Now I want to create a query to get all ConversationMeta for a particular Conversation:</p>
<div class="code panel" style="border-width: 1px;; border: 1px solid #ccc; background: #f5f5f5; font-size: 12px; line-height: 1.333; font-family: monospace; border: 1px solid #ccc; -moz-border-radius: 3px 3px 3px 3px; border-radius: 3px 3px 3px 3px; margin: 9px 0">
<div class="codeContent panelContent" style="padding: 9px 12px">
<pre class="code-java" style="margin: 10px 0 0 0; max-height: 30em; overflow: auto; white-space: pre-wrap; word-wrap: normal">
CriteriaQuery<ConversationMeta> criteriaQuery = criteriaBuilder.createQuery(ConversationMeta.class);
Root<ConversationMeta> conversationMeta = criteriaQuery.from(ConversationMeta.class);
criteriaQuery.where(criteriaBuilder.equal(conversationMeta.get(ConversationMeta_.conversation), conversation));
</pre>
</div>
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<p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0 0">The <tt>criteriaBuilder.equal(conversationMeta.get(ConversationMeta_.conversation), conversation)</tt> fails with IllegalArgumentException: Unaware how to convert value. The ConversationMeta_ metamodel class appears to be generating correctly, listing the <tt>conversation</tt> attribute as <tt>SingularAttribute<ConversationMeta, Conversation></tt> which is why I'm checking for equality with a <tt>Conversation</tt> and not an <tt>int</tt>. But the attribute in reality has a javaType of <tt>int</tt>, which is why the Conversation entity is being converted.</p>
<p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0 0">Changing the ConversationMeta.Id class to contain <tt>Conversation</tt> and <tt>Person</tt> entities, rather than {{int}}s is a fine workaround. I just wanted to record this odd behavior.</p>
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